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2001 | 48 | 1 | 257-269
Article title

The interactions of phthalocyanines with stimulated and resting human peripheral blood mononuclear cells.

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EN
Abstracts
EN
The interactions of two metal-free phthalocyanines [(H2Pc) and Solar Pc (with four peripherical groups: SO2N(CH2CH2OH)2)] and of one metal substituted dye (CoPc) with resting and stimulated human peripheral blood mononuclear cells (PBMC) were compared. The absorption, fluorescence, photoacoustic and EPR spectra of both resting cells and cells stimulated by phytohaemagglutinin, incubated in dimethyl sulfoxide (DMSO) with very low or 95% water content and with or without dye addition, were measured. The fate of the light absorbed by the samples was investigated. It is known that singlet oxygen production is crucial for photodynamic action of dyes. Thermal deactivation and luminescence emission compete with this process, so investigation of these alternative paths of sensitizer deactivation provides information about photodynamic action. The incorporation of the investigated dyes into cells and the perturbation of the cell structure caused by the dyes, the incubation solvent and the activator were investigated by comparing the spectral properties of PBMC before and after stimulation and incubation. Incubation of the cells for 1 h in a solution of Solar Pc in 99.5% aqueous DMSO, resulted in an efficient dye incorporation which was highly selective. Solar Pc being introduced much more efficiently into stimulated cells than into resting cells.
Publisher

Year
Volume
48
Issue
1
Pages
257-269
Physical description
Dates
published
2001
received
2000-09-20
revised
2000-12-14
accepted
2001-02-28
Contributors
  • Institute of Physics, Poznań University of Technology, Poznań, Poland
  • Institute of Physics, Poznań University of Technology, Poznań, Poland
  • Institute of Physics, Poznań University of Technology, Poznań, Poland
  • ZECASIN, Bucharest, Romania
author
  • Department of Biology and Environmental Studies, K. Marcinkowski University of Medical Sciences, Poznań, Poland
  • Department of Biology and Environmental Studies, K. Marcinkowski University of Medical Sciences, Poznań, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-abpv48i1p257kz
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